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science China(Physics,Mechanics & Astronomy) 2010年第5期53卷 818-822页

作者： wageh s Physics & Engineering Mathematics Department Faculty of Electronic EngineeringMenufiya University

Cadmium telluride nanocrystals that form in the TeO2-Li2O-B2O3-P2O5 glass matrix have been synthesized and *** are investigated by X-ray diffraction(XRD),optical transmission and infrared *** has been shown that the long annealing time effect on present samples leads to the growth of CdTe nanoparticles and an increase of tellurium oxide on the surface of *** the other hand,the infrared spectroscopy shows that the phosphate and borate networks of the glass matrices are modified with doping by CdTe nanoparticles.

关键词： CdTe nanocrystals quantum dots crystal structure optical properties

Design principle of s-scheme heterojunction photocatalyst

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Journal of Materials science & Technology 2022年第29期124卷 171-173页

作者： Quanlong Xu s.wageh Ahmed A.Al-Ghamdi Xin Li Key laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou325027China Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou510642China

Recently,a new opinion was put forward on general design standards for s-scheme heterojunction *** types of s-scheme heterojunctions were ***,the critical understanding on the curved Fermi level at the interface of s-... 详细信息

关键词： s-scheme heterojunction p-type semiconductor n-type semiconductor Curved Fermi level

significant capacitance enhancement induced by cyclic voltammetry in pine needle-like Ni-Co-Cu multicomponent electrode

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Journal of Materials science & Technology 2021年第19期78卷 100-109页

作者： Liqianyun Xu Liuyang Zhang Bei Cheng Jiaguo Yu Ahmed A.Al-Ghamdi s.wageh state Key Laboratory of Advanced Technology for Materials synthesis and Processing Wuhan University of TechnologyWuhan430070China school of Materials science and Engineering Zhengzhou UniversityZhengzhou.450001China Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia

Poor conductivity and rate capability are the obstacles faced by nickel-cobalt composites as electrode materials for supercapacitor ***,simple electrochemical treatment conducted by cyclic voltammetry is applied and the overall performance of the active material is considerably *** discover that this treatment triggers the formation of Ni-Co-Cu ternary composite and optimizes the crystal structure of the untreated *** areal capacitance of the treated sample rockets up to 6.13 F cm^(-2)at 2 m A cm^(-2),almost 13 times higher than the untreated ***,the resistance is substantially reduced by cyclic voltammetry ***,the Coulombic efficiency and stability are concurrently *** reasons behind this treatment are mulled over and reasonable hypothesis is *** study provides a cheap and effortless way to reform the structures of as-obtained samples as well as vigorously raise the performance of current available materials.

关键词： Cyclic voltammetry Ni-Co-Cu ternary composite Ion exchange supercapacitor

s-scheme ZnO/WO3 heterojunction photocatalyst for efficient H2O2 production

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Journal of Materials science & Technology 2022年第29期124卷 193-201页

作者： Zicong Jiang Bei Cheng Yong Zhang s.wageh Ahmed A.Al-Ghamdi Jiaguo Yu Linxi Wang state Key Laboratory of Advanced Technology for Materials synthesis and Processing Wuhan University of TechnologyWuhan 430070China Laboratory of solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074China Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

Designing highly efficient photocatalyst for hydrogen peroxide(HO)production is an ideal strategy to avoid the shortcomings of traditional HOproduction and to realize the conversion of solar energy to chemical *** this work,a step-scheme(s-scheme)heterojunction photocatalyst composed of Zn O and WOis carefully prepared by hydrothermal and calcination method for efficient photocatalytic *** ZW30 composite photocatalysts exhibit enhanced activity with the highest HO-production rate of 6788μmol *** results show that the photocatalytic HOproduction process is dominated by a direct two-electron Oreduction *** enhanced photocatalytic HO-production activity is attributed to the formation of interfacial internal electric field(IEF)in the s-scheme heterojunction,which boosts the spatial separation of charge carriers and enables electrons with the strongest reduction power to participate in *** work provides an in-depth insight of the great advantages of s-scheme heterojunction in photocatalytic HOproduction.

关键词： Photocatalysis Hydrogen peroxide step-scheme heterojunction O2 reduction Zinc oxide

钙钛矿太阳能电池中CsPbBr3纳米晶界面修饰剂的作用机制

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物理化学学报 2022年第7期38卷 1-3页

作者： s.wageh Ahmed A.Al-Ghamdi 赵丽 Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia 湖北大学材料科学与工程学院功能材料绿色制备与应用教育部重点实验室有机化工新材料湖北省协同创新中心武汉430062

During the past decade,organic-inorganic hybrid perovskite solar cell(PsC)has attracted great attention in the photovoltaic field 1,*** the third-generation solar cell,PsC in laboratory has already achieved certified power conversion efficiency(PCE)exceeding 25%.The superb photovoltaic performance of PsC is attributed to the unique optoelectronic properties of organic-inorganic halide perovskite light absorption layer,including low exciton binding energy,high absorption coefficients,and outstanding carrier mobility 3,***,the quality of perovskite film plays a decisive role in the photovoltaic performance of *** are inevitably formed on the surface and inside of polycrystalline perovskite film during the conventional preparation ***’s widely acknowledged that defects are the recombination centers of photogenerated electrons and holes,resulting in the loss of useful photogenerated charges 5,***,decreasing the charge loss is advantageous to improving the PCE of PsC.

关键词：钙钛矿太阳能电池界面修饰 perovskite

Photocatalytic antibacterial and osteoinductivity

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Chinese Journal of Catalysis 2021年第7期42卷 1051-1053页

作者： s.wageh Ahmed A.Al-ghamdi Lijun Liu 阿卜杜勒阿齐兹国王大学理学院物理系沙特阿拉伯吉达21589 武汉纺织大学化学与化工学院中国湖北武汉430200

Implants of titanium(Ti)and its alloys have been widely used for decades in bone tissue *** implantation is unavoidably accompanied by bacterial infection,which requires extensive surgical intervention and antibiotic *** infections increase the risk of implant failure and bone loss and can result in limb amputation in severe *** antibiotic treatment also induces irreversible drug resistance in humans[1,2].studies designed to optimize Ti containing implants have focused on surface modification or improvements of topological *** implants can induce stem cell differentiation and bone regeneration[3].However,designing implants that resist colonization by bacteria has not been explored extensively.

关键词：石墨炔活性氧物种抗菌性诱导骨组织生长生物相容性

Preparation of epoxy resin/rare earth doped aluminate nanocomposite toward photoluminescent and superhydrophobic transparent woods

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Journal of Rare Earths 2023年第3期41卷 397-405,I0003页

作者： Mehrez E.El-Naggar sami Ullah s.wageh M.A.Abu-saied Tawfik A.Khattab Dalal Alhashmialameer Manal Abou Taleb E.A.Matter Institute of Textile Research and Technology National Research CenterDokkiCairo16221Egypt Research Center for Advanced Materials science(RCAMs) King Khalid UniversityP.O.Box 9004Abha61413Saudi Arabia Department of Chemistry College of ScienceKing Khalid UniversityP.O.Box 9004Abha61413Saudi Arabia Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia K.A.CARE Energy Research and Innovation Center King Abdulaziz UniversityJeddah21589Saudi Arabia Polymeric Materials Research Department Advanced Technology and New Materials Research InstituteCity of Scientific Research and Technological Applications(SRTACITY)New Borg El-Arab CityAlexandria21934Saudi Arabia Department of Chemistry College of ScienceTaif UniversityTaif21944Saudi Arabia Department of Chemistry College of Science and HumanitiesPrince Sattam Bin Abdulaziz UniversityAl-kharj11942Saudi Arabia Department of Polymer Chemistry National Center for Radiation Research and Technology(NCRRT)Egyptian Atomic Energy AuthorityNasr CityP.O.Box 7551Cairo11762Egypt Department of Chemistry Faculty of ScienceDamanhour University22111 DamanhourEgypt

A translucent wooden substrate with long-lasting phosphorescence,high photostability and durability,tough surface,ultraviolet protection,high optical transmittance,and superhydrophobicity was *** long-lasting phosphorescent wooden substrate is able to continue emitting light for extended time ***-modified wood(LMW)was immobilized with a solution of epoxy resin(ER)and rare-earth doped aluminate(REDA)phosphor nanoparticles(NPs).For an improved dispersion of pigment,REDA was synthesized in a nanoscale particle size,and characterized by transmission electron microscopy(TEM)to indicate a particle size of 8-14 *** crystal structure of REDA nanoparticles was also proved by X-ray diffraction(XRD).For an improved production of long-persistent phosphorescent colo rless woods,REDA must be well-dispersed in MAA without *** and emissio n,as well as decay and lifetime spectra were *** morphologies of the wooden substrates with different ratios of REDA were investigated by scanning electron microscopy(sEM),X-ray fluorescence(XRF)analysis,Fourier transform infrared spectra(FT-IR),elemental mapping,and energy-dispersion Xray(EDXA).The phosphorescent woods show changes in color from colorless to green under ultraviolet(UV)irradiation,and to yellowish-green in the dark,as proved by the colorimetric parameters of the CIE Lab *** afterglow wood samples display an absorbance band at 365 nm and two phosphorescent bands at 431 and 520 *** UV shielding,photostability,and hydrophobicity were *** increasing REDA ratio,both static contact and slide angles are found to improve in the ranges of147.6°-163.6°and 9°-14°,*** long-lasting photoluminescence is optimized at a REDA ratio of 8%.The present strategy shows a large-scale production approach of multiple functional woods for many potential applications,such as smart glow in the dark windows and safety signs.

关键词： Translucent wood Rare-earth doped aluminate superhydrophobic Long-lasting light emission Ultraviolet protection

核壳Au@Nis1+x助催化剂实现高效TiO_(2)光催化制氢

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物理化学学报 2022年第7期38卷 4-6页

作者： s.wageh Ahmed A.Al-Ghamdi 徐全龙 Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia 温州大学化学与材料工程学院浙江省碳材料技术研究重点实验室浙江温州325027

The convertion of solar energy into hydrogen energy with high energy density by photocatalysis is a green and eco-friendly avenue to solve the energy crisis and environmental pollution issues 1,***,most photocatalysts usually suffer from the rapid quenching of photogenerated carriers and depressed interfacial H_(2)-generation dynamics 3,*** overcome the above shortcomings,cocatalysts are widely employed to promote the separation of photocarriers and to create active sites for surface catalytic reactions *** a superb cocatalyst,its active sites usually play a key role in the overall performance of photocatalytic H_(2) evolution because the active sites can not only provide a large number of adsorption centers to enrich H+,but also present an outstanding catalytic efficiency to convert H+into H_(2) by reducing its reaction overpotential ***,the active-site number and efficiency of cocatalysts should be maximized as much as possible to greatly boost the cocatalytic H2-evolution activity by photocatalysis.

关键词： convert overcome shortcomings

Cdse/PVK纳米晶薄膜及其电致发光特性

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光电子．激光 2003年第2期14卷 118-121页

作者：刘舒曼徐征 wageh s. 徐叙瑢北方交通大学光电子技术所信息存储显示与材料开放实验室北京100044

以巯基乙酸(RsH)为稳定剂,在水溶液中合成Cdse纳米晶,用表面活性剂将分散在水溶液中的纳米颗粒转移到有机溶剂中,与具有电荷输运性能的有机聚合材料复合,作为电致发光(EL)器件的工作层,得到较强的位于600nm附近的Cdse纳米晶的带边发射,... 详细信息

以巯基乙酸(RsH)为稳定剂,在水溶液中合成Cdse纳米晶,用表面活性剂将分散在水溶液中的纳米颗粒转移到有机溶剂中,与具有电荷输运性能的有机聚合材料复合,作为电致发光(EL)器件的工作层,得到较强的位于600nm附近的Cdse纳米晶的带边发射,以及较弱的位于420nm附近的来自聚合物的发射。器件EL强度首先随着外加电压的增加而增加,当电压超过26V时,EL强度开始下降。器件的电流-电压(I-V)特性基本符合二极管特性,表明器件是受载流子注入限制的。

关键词： Cdse/PVK纳米晶薄膜电致发光制备方法

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利用飞秒技术研究电荷转移动力学

Chinese Journal of Catalysis 2023年第6期49卷 5-7页

作者：朱君江 s.wageh Ahmed A.Al-Ghamdi 武汉纺织大学化学与化工学院生物质纤维与生态染整湖北省重点实验室湖北武汉430200 阿卜杜勒阿齐兹国王大学理学院物理系沙特阿拉伯吉达

光催化材料和技术可合理利用太阳能,完成能量转化与存储,并实现环境治理和双碳目标.光催化剂活性是影响其效率的关键,因此光催化剂的合理设计成为研究热点.为抑制光生电子和空穴的快速复合并拓展单一光催化剂的光吸收范围,可通过构建异... 详细信息

光催化材料和技术可合理利用太阳能,完成能量转化与存储,并实现环境治理和双碳目标.光催化剂活性是影响其效率的关键,因此光催化剂的合理设计成为研究热点.为抑制光生电子和空穴的快速复合并拓展单一光催化剂的光吸收范围,可通过构建异质结特别是新兴的梯型(s型异质结)的策略.在保有体系最大氧化还原能力的同时,实现光生电荷的有效分离.可通过原位光照X射线光电子能谱和原位光照原子力显微镜等技术研究梯型异质结的电荷转移机制,然而,目前尚缺少对于异质结界面处瞬态动力学的深入研究.近期,中国地质大学(武汉)余家国教授、张留洋教授与湖北文理学院梁桂杰教授合作,通过原位生长策略,在芘基共轭聚合物(PDB)表面原位生长硫化镉(Cd s)纳米晶体,制备了一系列硫化镉/聚合物梯型异质结(CPDB),并系统地研究了异质结界面处的稳态电荷分布以及瞬态电荷转移动力学.密度泛函理论计算和开尔文探针测试结果表明,暗态下电子由PDB向Cd s转移,并在界面处形成内建电场和能带弯曲.原位光照X射线光电子能谱表明,在内建电场和能带弯曲的驱动下,Cd s的光生电子与PDB的光生空穴复合,而PDB的光生电子与Cd s的光生空穴得以保留.利用飞秒瞬态吸收技术揭示了异质结界面处的电荷转移演化过程.通过实验信号的拟合分析,Cd s的光生电子有三条衰减路径:晶格间的电子扩散、光生电子空穴对直接复合以及光生电子与捕获态空穴复合.对于CPDB复合物而言,除了上述三种衰减路径,还发现Cd s的光生电子与PDB的光生空穴复合路径.作者通过调控Cd s/PDB配比,阐述了异质结界面电荷转移过程动力学与其光催化性能的关系.结果表明,随着PDB含量的增加,Cd s与PDB之间界面电荷转移寿命越短(速度越快);然而,加入过量PDB会导致聚合物发生聚集,从而抑制界面电荷转移.该结论与CPDB复合物的光催化性能表现一致.综上,该工作通过使用飞秒瞬态吸收技术,对梯型异质结光催化剂的界面电荷转移过程进行了直接跟踪观测,为揭示光催化过程中的复杂机制提供了新思路.

关键词：光催化飞秒瞬态吸收梯型异质结硫化镉共轭聚合物